Dry roast Rava in a Kadai until it turns golden brown and the raw smell disappears. Keep aside.
Cook avarekai with salt in boiling water until it turns soft and keeps aside. I used frozen avarekai, so I boiled for just 5 minutes.
Heat oil in Kadai. Add mustard seeds, jeera, urad dal, hing, curry leaves, green chili, saute for 30 secs.
Next, add the chopped onions and fry till it turns light brown.
Add boiled avarekai, salt, turmeric powder, vangi bath powder, and cook for 2-3 minutes.
Now add 1.5 cups of water to the onions. After the water starts boiling, add roasted rava little by little and continuously stir to avoid lumps.
Cook covered for about 2-3 mins on medium-low flame. Add lime juice, coriander leaves, grated coconut, and mix well.
Remove from stove and serve hot.